Experiment Study on Fatigue Performance of Copper Alloy Thin Plate for Anti Icing of Propeller Blades

YANG Tingyong; DENG Wen; LI Tianyong; LIAO Yunfei; LAN Zhiyun

doi:10.7643/issn.1672-9242.2025.08.013

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Equipment Environmental Engineering ›› 2025, Vol. 22 ›› Issue (8) : 100-107. DOI: 10.7643/issn.1672-9242.2025.08.013

Aviation and Aerospace Equipment

Experiment Study on Fatigue Performance of Copper Alloy Thin Plate for Anti Icing of Propeller Blades

YANG Tingyong¹, DENG Wen¹, LI Tianyong¹, LIAO Yunfei², LAN Zhiyun³

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Abstract

The work aims to compare and study the fatigue performance of CuNi23 alloy and T2 purple copperthin plates applied to helicopter blade anti icing copper alloy materials, to provide a scientific basis for predicting the fatigue life of copper alloythin plates. Finite element analysis software was used to perform static and modal analysis on static and fatigue thin plate test specimens. The lifting method and the grouping method were used to conduct fatigue experiments on CuNi23 alloy and T2 copper thin plates. The three parameter Stromeyer equation was used to fit the S-N curves of the two materials, and the S-N curve fitting equation was obtained. Finally, the fatigue fracture surfaces of the two materials were compared and analyzed using a scanning electron microscope. The finite element analysis results indicated that both the static tensile test specimens and fatigue test specimens designed in this paper met the testing requirements. The fatigue limits of CuNi23 alloy and T2 copper in the 1×10⁷ high life zone were measured to be 269 MPa and 123 MPa, respectively, using the lifting method fatigue test; S-N fitting curves of CuNi23 alloy and T2 purple copper, respectively S=259.26(1+0.111 2/N^{0.631 7}) and S=9.127×10^-7(1+1.719×10⁸/N^{0.094 2}). The fatigue resistance of CuNi23 alloy is significantly better than that of T2 copper. The fatigue S-N curve indicates that the fatigue curve of CuNi23 alloy tends to flatten, while the fatigue curve of T2 copper shows a decreasing trend. The fatigue band spacing of CuNi23 alloy is shorter than that of T2 copper, with a lower crack propagation rate and better fatigue performance.

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CuNi23 alloy / T2 purple copper / fatigue test / S-N curve / lifting method / group method

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YANG Tingyong, DENG Wen, LI Tianyong, LIAO Yunfei, LAN Zhiyun. Experiment Study on Fatigue Performance of Copper Alloy Thin Plate for Anti Icing of Propeller Blades[J]. Equipment Environmental Engineering. 2025, 22(8): 100-107 https://doi.org/10.7643/issn.1672-9242.2025.08.013

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